Pump



FIG. 1 is a perspective view of a pump in accordance with our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a right-side elevational view thereof, a mirror image of which is a left-side elevational view. 

The ornamental design for a pump, as shown and described. 